docs: def param(name, help=""):
      """Decorator that add a parameter to the wrapped command or function."""
      def decorator(func):
          params = getattr(func, "params", [])
          _param = Param(name, help)
          # Insert at the beginning so the apparent order is preserved
          params.insert(0, _param)
          func.params = params
          return func
  
      return decorator